Method for determining the positions of a plurality of anonymous fixed reference objects for mobile surface transportation and a device for determining said positions
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United States of America Patent
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Jan 4, 2000
Issued Date -
N/A
app pub date -
Oct 15, 1998
filing date -
Apr 15, 1996
priority date (Note) -
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Abstract
Methods and apparatus are disclosed for determining the positions of fixed reference objects for use in controlling the movement of mobile surface transportation units over a surface. The method includes detecting bearings from a measuring point on a mobile apparatus to the reference objects at predetermined times associated with movement of the mobile apparatus over the surface, storing the bearings along with the predetermined time associated therewith, and continuously computing the position of the reference objects and the degree of uncertainty associated with those positions from the bearings whereby the degree of uncertainty is reduced as the mobile apparatus moves over the surface.
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